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Road salt emissions :
Road salt emissions : A comparison of measurements and modelling using the NORTRIP road dust emission model
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- Denby, B. R. (author)
- Norwegian Meteorological Institute (MET), Norway,The Norwegian Meteorological Institute (MET)
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- Ketzel, M. (author)
- Aarhus University, Denmark
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- Ellermann, T. (author)
- Aarhus University, Denmark
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- Stojiljkovic, A. (author)
- Nordic Envicon Oy, Finland
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- Kupiainen, K. (author)
- Nordic Envicon Oy, Finland
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- Niemi, J. V. (author)
- Helsinki Region Environmental Services Authority (HSY), Finland
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- Norman, M. (author)
- Environment and Health Protection Administration of the City of Stockholm, Sweden
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- Johansson, Christer (author)
- Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi,Environment and Health Protection Administration of the City of Stockholm, Sweden
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- Gustafsson, Mats (author)
- Statens väg- och transportforskningsinstitut,Miljö, MILJÖ,VTI Swedish National Road and Transport Research Institute, Sweden
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- Blomqvist, Göran (author)
- Statens väg- och transportforskningsinstitut,Miljö, MILJÖ,VTI Swedish National Road and Transport Research Institute, Sweden
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- Janhäll, Sara, 1965- (author)
- Statens väg- och transportforskningsinstitut,Miljö, MILJÖ,VTI Swedish National Road and Transport Research Institute, Sweden
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- Sundvor, I. (author)
- Norwegian Institute for Air Research (NILU), Norway,The Norwegian Institute for Air Research (NILU)
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(creator_code:org_t)
- Elsevier Ltd, 2016
- 2016
- English.
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In: Atmospheric Environment. - : Elsevier Ltd. - 1352-2310 .- 1873-2844. ; 141, s. 508-522
- Related links:
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Abstract
Subject headings
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- De-icing of road surfaces is necessary in many countries during winter to improve vehicle traction. Large amounts of salt, most often sodium chloride, are applied every year. Most of this salt is removed through drainage or traffic spray processes but a certain amount may be suspended, after drying of the road surface, into the air and will contribute to the concentration of particulate matter. Though some measurements of salt concentrations are available near roads, the link between road maintenance salting activities and observed concentrations of salt in ambient air is yet to be quantified. In this study the NORTRIP road dust emission model, which estimates the emissions of both dust and salt from the road surface, is applied at five sites in four Nordic countries for ten separate winter periods where daily mean ambient air measurements of salt concentrations are available. The model is capable of reproducing many of the salt emission episodes, both in time and intensity, but also fails on other occasions. The observed mean concentration of salt in PM10, over all ten datasets, is 4.2 μg/m3 and the modelled mean is 2.8 μg/m3, giving a fractional bias of −0.38. The RMSE of the mean concentrations, over all 10 datasets, is 2.9 μg/m3 with an average R2 of 0.28. The mean concentration of salt is similar to the mean exhaust contribution during the winter periods of 2.6 μg/m3. The contribution of salt to the kerbside winter mean PM10 concentration is estimated to increase by 4.1 ± 3.4 μg/m3 for every kg/m2 of salt applied on the road surface during the winter season. Additional sensitivity studies showed that the accurate logging of salt applications is a prerequisite for predicting salt emissions, as well as good quality data on precipitation. It also highlights the need for more simultaneous measurements of salt loading together with ambient air concentrations to help improve model parameterisations of salt and moisture removal processes. © 2016 The Authors
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- Air quality
- Modelling
- Non-exhaust emissions
- Particulate matter
- Road salt
- Dust
- Models
- Roads and streets
- Salt removal
- Transportation
- Ambient air concentration
- Comparison of measurements
- Exhaust emission
- Road dust emissions
- Road salts
- Sensitivity studies
- Simultaneous measurement
- Precipitation (chemical)
- sodium chloride
- ambient air
- atmospheric pollution
- concentration (composition)
- numerical model
- road
- seasonal variation
- traffic emission
- air monitoring
- Article
- exhaust gas
- highway
- measurement
- precipitation
- priority journal
- road salt emission
- vapor pressure
- winter
- 15 Road: Environment
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Denby, B. R.
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Ketzel, M.
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Ellermann, T.
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Stojiljkovic, A.
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Kupiainen, K.
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Niemi, J. V.
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show more...
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Norman, M.
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Johansson, Chris ...
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Gustafsson, Mats
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Blomqvist, Göran
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Janhäll, Sara, 1 ...
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Sundvor, I.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Other Earth and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Atmospheric Envi ...
- By the university
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RISE
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VTI - The Swedish National Road and Transport Research Institute
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Stockholm University